Carriage for pneumatic hammers.



H. MEYER & M. EBERHARDT.

CARRIAGE FOR PNEUMATIC HAMMERS.

APPLICATION FILED MAY]. 1914.,

1,160,636. Patented Nov. 16, 1915.

all? (0/? v jerinan/ We) Jame/Z506 UNITED STATES PATENT OFFICE.

HERMAN MEYER AND MICHAEL EBERHARD'I, OF CHICAGO, ILLINOIS, ASSIGNORS TO THE PULLMAN COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CARRIAGE FOR PNEUMATIC HAMMERS.

Application filed May 7, 1914.

To all whom it may concern.

Be it known that we, HERMAN MEYER and MICHAEL EBERHARDT, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Carriages for Pneumatic Hammers, of which the following is a specification.

The invention has for its object the provision of a carriage wherein a pneumatic hammer or other tool is supported in such manner as to be bodily movable over and upon the surface ofa steel plate or the like whereby the hammer may be brought to bear upon difl'erentportions of the sheet in succession as in smoothing operations and the carriage also arranged to confine the hammer vertically in order to prevent recoil.

Carriages for pneumatic tools have been employed wherein the carriage is movable on a track or within guides provided for the purpose adjacent the work, and such tools have also been mounted in arms pivoted to swing about a movable center. According to our invention, however, the tool is provided with a wheeled carriage adapted to roll freely over and upon the work surface in all directions, the tool clamped within the carriage in symmetrical relation thereto and the weight of the carriage supplementing that of the tool to hold it to its work.

\ In order that the invention may be readily understood a preferred embodiment of the same is set forth in the accompanying drawing and in the description based thereon. As the invention is obviously capable of embodiment in other and varied constructional forms the drawing and description are to be taken in an illustrative and not in an unnecessarily limiting sense.

In the drawing Figure 1 is a side elevation of the carriage and a pneumatic hammer in operative relation to the work surface; and Fig. 2 is a top plan view of the carriage disassociated from the hammer.

In the embodiment of the invention illustrated the carriage is shown as comprising two similar halves each including the frame member 11, with legs 12 equipped with balls, Wheels, or other rolling elements 13 adapted to freely travel in all directions over the surface of a sheet of steel or the like 14. Arising from the frame member 11 and preferably upwardly converging are a Specification of Letters Patent.

Patented Nov. 16, 1915.

Serial No. 836,873.

set of standards 15 connected at their upper ends by means of the frame member 16. The frame members 11 and 16 are substantially semicircular and respectively diamet rically connected by means of bars 17 and 18 medially bent at 19' and 20 to provide vertically alined semicircular recesses. The bars 17 and 18 of the two halves of the car riage are adapted to be adjustably connected by means of bolts 21 and 22, whereby the two halves may be drawn together upon a pneumatic hammer or other tool 23 p0sitioned within the vertically alined recesses of the bars 17 and 18. Supplemental standards 23 may also be employed to connect in a rigid manner the lower and upper frame members 11 and 16.

In order to confine the hammer vertically within the carriage and thus utilize the weight of he carriage to resist recoil a yoke or strap member 21 is bolted to the upper frame members 16 at 25, 25 and in its medial portion overlies at 26 the upper end of the hammer. Mounted as a lever upon the frame member 11 is a thumb piece 27 arranged conveniently within reach of the workman who grasps the frame 11 in manipulating the hammer over the surface of the work piece. The thumb piece 27 is connected by means of the rod 28 with the operating trigger 29 of the hammer whereby the operation of the hammer is brought under the instantaneous control of the workman without the necessity of shifting his hand from its position grasping the frame member 11. It will thus be seen that the hammer is symmetrically mounted and confined within the bodily movable carriage which latter is free to move in every direction over the work surface under the control of the workman who grasps the carriage and who at the same time has instant and complete control of the operation of the hammer.

lVe claim:

1. The combination of a two-part Wheeled carriage, a pneumatic tool, means to clamp the parts of the carriage upon the body of the tool, and a yoke secured to the carriage and overlying the tool body to confine the same vertically, substantially as described.

2. The combination of a two-part wheeled carriage, a pneumatic tool, means to clamp the parts of the carriage upon the body of the tool, a yoke secured to the carriage and overlying the tool body to confine the same Vertically, and a connection between the operating lever of the tool and that portion of the carriageadapted to be grasped by the workman whereby the tool may be con trolled and the carriage manipulated from the same point, substantially as described.

3. The combination of a two-part wheeled carriage, a pneumatic tool, means to clamp the parts of the carriage upon the body of the tool to support the latter centrally therein, a yoke secured to the carriage and overlying the tool body to confine the same vertically, a thumb piece mounted on the carriage in position to be engaged by the workman while manipulating the carriage, and a connection between the operating lever of the tool and the thumb'piece, the whole bodily movable over and upon a work surface, substantially as described.

In testimony whereof we have hereunto signed our names in the presence of two subscribing witnesses.

HERMAN MEYER. MICHAEL EBERHARDT. lVitnesses:

F. N. SORGENFREL, SAMUEL MAYER HAIMOWITZ.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

7 Washington, I). G. 

